Physics for You

1
Plenary
OCR P1b
This PowerPoint file contains the Plenary for
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Chapter 9 OCR topic P1b Keeping Houses warm
2
Keeping Houses warm
OCR P1b

• State the formula for efficiency.
• Name 3 ways of reducing the heat lossfrom a
  house.

3
Keeping Houses warm
OCR P1b
Answers

• State the formula for efficiency.
• Name 3 ways of reducing the heat lossfrom a
  house.

efficiency useful energy output total
energy input
Any 3 from loft insulation, cavity-wall
insulation, draught excluders, thick
carpets, thick curtains, double-glazed
windows.
4
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